Drinking straw



FIG. 1 is an isometric view in accordance with the present design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof. 

CLAIM We claim the ornamental design for a drinking straw, as shown and described. 